Instead, immigration has emerged as one of Trump’s strongest issues in public polling, reflecting both his grip on the Republican base and a broader shift in public sentiment that is driven in part, interviews suggest, by anger at the policies of his predecessor, Democrat Joe Biden.

There has been concern that President Trump’s immigration crackdown would one day extend beyond undocumented immigrants to target U.S. citizens. The arrest of Mohsen Mahdawi, a pro-Palestine activist and green-card holder who was detained by ICE agents last week at his naturalization interview in Colchester,